1. "Ocular Surgery", trans. from 3rd Spanish;ARRUGA, H.,1952
2. BARRAQUER, I. (1917). Siglo mid., 64, 266, 740, 768.
3. BELL, A. E. (1948). Amer. J. Ophthal., 31, 610.
4. Cited by Arruga;DIMITRY, J.;J. Ophthal; Brit,1941
5. HARRINGTON, D. O. (1951). Amer. J. Ophthal., 34, 435, 1395.